Ichikoh Industries, Ltd.

Nissan Motor Company Limited

Kiichiro Shimura

Takeo Tamura

Morimasa Tanaka

Hiroshi Hara

Takayoshi Kido

A motor drive circuit fo driving a reversible motor selectively in a forward or reverse direction comprises a main switch for connecting electrically the motor drive circuit to a power supply source, auxiliary switch circuitry for determining a current path along which a current is to be supplied from the power supply source to the reversible motor and duration in which the current is supplied to the motor, current supply control circuitry for detecting the current path determined by the auxiliary switch circuitry and causing the current to flow along the determined electric path, hold circuitry for holding the operating state of the current supply control circuitry, oscillation circuitry operable in response to the operation of the main switch establishing the connection to the power supply source to supply a reset signal to the hold circuitry and cause the current supply control circuitry to perform current detecting operation through the hold circuit, and current interrupting circuitry for breaking the connection to the power supply source in response to detection of interruption of the current flow to the motor, wherein the direction in which the motor is rotated is alternately changed over upon every closing operation of the main switch.

Motor drive circuit

A wiper device for wiping rain on a mirror surface of a rear-view mirror provided on the exterior of an automotive vehicle, includes a driving means of the wiper blade for driving the latter in first and second directions alternatively. The driving device comprises an electric circuit which includes a switching means and a means for detecting both ends of the wiper blade motions in the first and second directions. The switching means is operative to switch direction of an electric power supply to an electric motor when the detecting means detects the end of wiper blade motion.

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Tokyo, Japan

Kiichiro Shimura